/Engine/Source/Runtime/Engine/Public/Instances/InstancedPlacementPartitionActor.h
[FClientPlacementInfo](API\Runtime\Engine\Instances\FClientPlacementInfo) * PreAddClientInstances ( const [FGuid](API\Runtime\Core\Misc\FGuid) & ClientGuid, const [FString](API\Runtime\Core\Containers\FString) & InClientDisplayString, [FClientDescriptorFunc](API\Runtime\Engine\Instances\AInstancedPlacementPartitionActo-\FClientDescripto-) RegisterDefinitionFunc )